Posted by admin in This was at Mason City, IA this year! People in attendence were given 3D glasses. Our driver put the filter over his camera. Very cool effect! FIREWORKS IN 3D!!! Next year's PGI convention is at Appleton, Wisconsin! Should be back to Mason City in 4-5 years. ONCE YOU SEE THESE SHOWS, YOU WILL NEVER NEED TO SEE ANOTHER FIREWORKS DISPLAY!!!! ... PGI fireworks mason city iowa tours travel rockets explosions motor coaches bombs